Read Edit View history 恒等式 héngděngshì identity Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 恒等式/ 恆等式 héngděngshì identity identity (math.) 我们可以利用三角恒等式来化简这个复杂的数学表达式。 Edit Delete References Add reference No references for this word.